Liquid Dynamics
Liquid Dynamics Inc. Techincal Services
LIQUID DYNAMICS Ltd. offer Pulsation / Vibraton and Shock - Analysis & Diagnostics + Software Models
Please call toll free USA 1-888-326-7377 WE HAVE PEOPLE - Not voice mail. --44-161-480-9625 UK
Fluid Flow Control Animations
Fluid Flow Control Animations

Shock Prevention Software

ShockView from LDi is a highly accurate water-hammer and shock wave modelling system. Water hammer is a dynamic phenomenon, and LDi's preventative hardware also operates on dynamic principles, so ShockView is based on many partial differential equations. The software can be used for two purposes:

    1. to determine how slowly valves must be closed or pumps started up in order to prevent shock waves being formed
    2. where this is not feasible, to determine the size and type of LDi hardware required to eliminate the problem

To do this, you will need to know the following system parameters accurately:

Liquid parameters


Pipe parameters

Inside diameter
Wall thickness
Bulk modulus of material

Sytem parameters

Inlet steady state pressure
Mass flow rate
Maximum allowable pressure

Valve or pump parameters

Valve closing or pump start-up time
Valve area change characteristic e.g. linear

From this information, ShockView produces a graph showing how the pressure within the pipe varies over time after the valve is closed.

ShockView has been tested extensively by comparing its predictions with results from an actual test rig. The results of these tests show how accurate ShockView is.

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If you have a pipeline or pump user problem which requires pulsation analysis, diagnostics, or prediction by software:
The definitions of many problems can be found at


Liquid Dynamics provides pipeline and pump user problem analysis, diagnostics, and prediction by software. For water hammer and shock solutions pulsation dampening and shock alleviating devices can be obtained from our associate websites PulseGuard and ShockGuard.


For Hardware see our associate websites: and for further information about pulsation dampeners and pumping systems. and to find large gas bag vessels, jumbo bladders, float separator and big bellows type pipeline shock attenuators and expansion / contraction volume compensators. for more about pulse dampers in pumping systems and water hammer.
Water Hammer  and for more on water hammer, pump start up surge, shut down back flow, & valve closure hammer. and for information about energy saving in pumping systems, standby emergency power, and safety shutdown systems. for a quick view of how each different type of pulse dampener is matched to a pump installation. Pumps make flow, system resistance to flow is pressure, systems make pressure and pressure pulsation. to find protection against excess flow. Guard against toxic spills when pipes burst, guard against gushers and fluid loss when hoses split, Flow-Guard guards against excess flow floods.

Fluid Flow Control The Fluid Flow Control Source Pumps Accumulators Filters Dampers Heat Exchangers Valves Mixers P.I. / Pressure Indicators Controls Meters Vessels